Bug path

‘test_2’: events 1-2

19	void test_2 (struct foo f_outer)
	^~~~~~
	\|
	(1) entry to ‘test_2’
20	{
21	called_by_test_2 (f_outer);
	~~~~~~~~~~~~~~~~~~~~~~~~~~
	\|
	(2) calling ‘called_by_test_2’ from ‘test_2’

‘called_by_test_2’: events 3-5

14	static void called_by_test_2 (struct foo f_inner)
	^~~~~~~~~~~~~~~~
	\|
	(3) entry to ‘called_by_test_2’
15	{
16	free (f_inner.ptr);
	~~~~~~~~~~~~~~~~~~
	\|
	(4) first ‘free’ here
17	free (f_inner.ptr); /* { dg-warning "double-'free' of 'f_outer.ptr'" } */
	~~~~~~~~~~~~~~~~~~
	\|
	(5) second ‘free’ here; first ‘free’ was at (4)